From 7d55679684f7847fb61af25a243af7ca0b166e2c Mon Sep 17 00:00:00 2001
From: anjiahao <anjiahao@xiaomi.com>
Date: Wed, 24 Apr 2024 12:07:48 +0800
Subject: [PATCH] fs/ioctl:add FIOC_XIPBASE to get file xip address

in tmpfs/romfs, we can get file real xip address to execute program

Signed-off-by: anjiahao <anjiahao@xiaomi.com>
---
 fs/romfs/fs_romfs.c      | 15 +++++++++++++++
 fs/tmpfs/fs_tmpfs.c      |  7 +++++++
 include/nuttx/fs/ioctl.h |  3 +++
 3 files changed, 25 insertions(+)

diff --git a/fs/romfs/fs_romfs.c b/fs/romfs/fs_romfs.c
index e5af8c988b602..7c34925fffb85 100644
--- a/fs/romfs/fs_romfs.c
+++ b/fs/romfs/fs_romfs.c
@@ -604,6 +604,21 @@ static int romfs_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
       strlcat(ptr, rf->rf_path, PATH_MAX);
       return OK;
     }
+  else if (cmd == FIOC_XIPBASE)
+    {
+      FAR struct romfs_mountpt_s *rm = filep->f_inode->i_private;
+      FAR uintptr_t *ptr = (FAR uintptr_t *)arg;
+
+      if (rm->rm_xipbase != 0)
+        {
+          *ptr = (uintptr_t)rm->rm_xipbase + rf->rf_startoffset;
+          return OK;
+        }
+      else
+        {
+          return -ENXIO;
+        }
+    }
 
   return -ENOTTY;
 }
diff --git a/fs/tmpfs/fs_tmpfs.c b/fs/tmpfs/fs_tmpfs.c
index 2e4dc5a91dd7c..ce635d1efb975 100644
--- a/fs/tmpfs/fs_tmpfs.c
+++ b/fs/tmpfs/fs_tmpfs.c
@@ -1825,6 +1825,13 @@ static int tmpfs_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
           return ret;
         }
     }
+  else if (cmd == FIOC_XIPBASE)
+    {
+      FAR uintptr_t *ptr = (FAR uintptr_t *)arg;
+
+      *ptr = (uintptr_t)tfo->tfo_data;
+      return OK;
+    }
 
   return ret;
 }
diff --git a/include/nuttx/fs/ioctl.h b/include/nuttx/fs/ioctl.h
index 17cb8d5c4f5e5..8ed1e1b926a47 100644
--- a/include/nuttx/fs/ioctl.h
+++ b/include/nuttx/fs/ioctl.h
@@ -226,6 +226,9 @@
 #define FIOC_SETLKW         _FIOC(0x0014) /* IN:  Pointer to flock
                                            * OUT: None
                                            */
+#define FIOC_XIPBASE        _FIOC(0x0015) /* IN:  uinptr_t *
+                                           * OUT: Current file xip base address
+                                           */
 
 /* NuttX file system ioctl definitions **************************************/